SmogRank / History / City race
Cities in Hong Kong, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Hong Kong for PM2.5 over the 30 days to 13 Jun 2025: Wan Chai 18.2 µg/m³, Tuen Mun 12.3 µg/m³ and Fanling 11.4 µg/m³.
- 1Wan ChaiWan Chai18.2
- 2Tuen MunTuen Mun12.3
- 3FanlingNorth District11.4
- 4Mong KokYau Tsim Mong District10.9
- 5San Tung Chung HangIslands10.7
- 6Sham Shui PoSham Shui Po District10.4
- 7Kwai ChungKwai Tsing District10.4
- 8Sau Mau PingKwun Tong District10.0
- 9Tai PoTai Po9.9
- 10Tin Shui WaiYuen Long9.6
- 11Tsuen WanTsuen Wan9.3
- 12VictoriaCentral and Western8.8
- 13Sha TinSha Tin7.7
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.